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Tree 180 is the topology that is similar to the extended
star topology. The primary difference is that it does not use one central
node. It uses a trunk node from which it branches to other nodes.
There are two types of tree topologies: the binary tree (each node splits
into two links) and the backbone tree (a backbone trunk has branch nodes
with some links hanging from it). The trunk is a main wire that has
several layers of branches. From a logical perspective, the flow of
information is hierarchical.

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